參數(shù)資料
型號: HM5257165BTD-A6
廠商: ELPIDA MEMORY INC
元件分類: DRAM
英文描述: 512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword 】 16-bit 】 4-bank/16-Mword 】 8-bit 】 4-bank /32-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
中文描述: 32M X 16 SYNCHRONOUS DRAM, 6 ns, PDSO54
封裝: 0.400 INCH, PLASTIC, TSOP2-54
文件頁數(shù): 12/62頁
文件大?。?/td> 463K
代理商: HM5257165BTD-A6
HM5257165B/HM5257805B/HM5257405B-75/A6
Data Sheet E0081H10
12
DQM Truth Table
(HM5257165B)
CKE
Command
Symbol
n - 1
n
DQMU
DQML
Upper byte (DQ8 to DQ15) write enable/output enable ENBU
H
×
×
×
×
L
×
Lower byte (DQ0 to DQ7) write enable/output enable
ENBL
H
×
L
Upper byte (DQ8 to DQ15) write inhibit/output disable MASKU
H
H
×
Lower byte (DQ0 to DQ7) write inhibit/output disable
Note:
H: V
IH
. L: V
IL
.
×
: V
IH
or V
IL
.
Write: I
DID
is needed.
Read: I
DOD
is needed.
MASKL
H
×
H
DQM Truth Table
(HM5257805B/HM5257405B)
CKE
Command
Symbol
n - 1
n
DQM
Write enable/output enable
ENB
H
×
×
L
Write inhibit/output disable
Note:
H: V
IH
. L: V
IL
.
×
: V
IH
or V
IL
.
Write: I
DID
is needed.
Read: I
DOD
is needed.
MASK
H
H
The SDRAM can mask input/output data by means of DQM, DQMU/DQML.
DQMU masks the upper byte and DQML masks the lower byte. (HM5257165B)
During reading, the output buffer is set to Low-Z by setting DQM, DQMU/DQML to Low, enabling data
output. On the other hand, when DQM, DQMU/DQML is set to High, the output buffer becomes High-Z,
disabling data output.
During writing, data is written by setting DQM, DQMU/DQML to Low. When DQM, DQMU/DQML is set
to High, the previous data is held (the new data is not written). Desired data can be masked during burst read
or burst write by setting DQM, DQMU/DQML. For details, refer to the DQM, DQMU/DQML control
section of the SDRAM operating instructions.
相關(guān)PDF資料
PDF描述
HM5257405BTD-A6 512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword 】 16-bit 】 4-bank/16-Mword 】 8-bit 】 4-bank /32-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5257805B-75 Circular Connector; Body Material:Aluminum; Series:PT06; Number of Contacts:30; Connector Shell Size:18; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Circular Contact Gender:Pin; Insert Arrangement:18-30
HM5257405B-75 Circular Connector; Body Material:Aluminum; Series:PT06; Number of Contacts:30; Connector Shell Size:18; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Circular Contact Gender:Pin; Insert Arrangement:18-30
HM5257805B-A6 16 M EDO DRAM(2-Mword*8-bit) 2K Refresh
HM5257405B-A6 Circular Connector; No. of Contacts:32; Series:; Body Material:Aluminum; Connecting Termination:Solder; Connector Shell Size:18; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:18-32
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HM5257405B-75 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword 】 16-bit 】 4-bank/16-Mword 】 8-bit 】 4-bank /32-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5257405B-A6 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword 】 16-bit 】 4-bank/16-Mword 】 8-bit 】 4-bank /32-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5257405BTD-75 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword 】 16-bit 】 4-bank/16-Mword 】 8-bit 】 4-bank /32-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5257405BTD-A6 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword 】 16-bit 】 4-bank/16-Mword 】 8-bit 】 4-bank /32-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5257805B-75 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword 】 16-bit 】 4-bank/16-Mword 】 8-bit 】 4-bank /32-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM